Power Relay Expansion Module for Raspberry Pi, Relay Board with Dual Cooling Fans & Auto Color Changing LED, Compatible with Pi A+, 3A+, B+, 2B, 3B, 3B+, 4B

This power relay expansion module is customized for Raspberry Pi single-board computers, perfectly matching the hardware installation of Raspberry Pi A+, 3A+, B+, 2B, 3B, 3B+ and 4B. It extends reliable relay control functions, allowing users to control external electrical loads easily for smart home, industrial control, experimental development and DIY automation projects.

The module comes with dual cooling fans to dissipate heat continuously during long-hour operation. It prevents overheating caused by continuous relay triggering and high load operation, greatly improving equipment stability and service life. An auto color changing LED is integrated on the board; different light colors correspond to different working states, helping you quickly judge whether the module is running normally without complex detection tools.

With standardized pin layout, it can be stacked directly onto Raspberry Pi for simple assembly. The relay supports safe switch control of external equipment, meeting the requirements of most small automation experiments. No complicated modification is needed for basic use, friendly for electronics enthusiasts, students and DIY makers.

Compact structure saves desktop space and facilitates embedded project installation. Ideal for robot development, smart lighting control, greenhouse monitoring, experimental testing and other Raspberry Pi-based development scenarios.

Please pay attention to the load power parameters when driving external devices to avoid exceeding the rated load of the relay.